package com.liujing.simplefactory;

/**
 * @program: DesignPattenDemo
 * @description:
 * @author: liujing
 * @create: 2019-11-21 09:57
 **/
public class OperationSub extends Operation {
    @Override
    public double getResult() {
        double result = 0;
        return getNumberA() - getNumberB();
    }
}
